Abstract: Component refining is of great significance for the construction of modern integrated refining and petrochemical facilities. To fully utilize C₅ and C₆ light naphtha resources, SINOPEC Research Institute of Petroleum Processing Co., Ltd. has developed a technology for optimized utilization of gasoline light fractions. This technology primarily consists of core components such as the RAN-520 adsorbent, the Recane process, the RACS control system, and the adsorption tower grid RACI03. A 1.0 Mt/a light gasoline fraction optimization unit at a petrochemical company successfully started up in May 2023，and a 100% load unit assessment was conducted in March 2024. The assessment results showed that after adsorption separation, the mass fraction of n-alkanes in the extracted oil reached 95.89%, making it an excellent feedstock for steam cracking. The mass fraction of iso-alkanes in the raffinate oil reached 92.77%, with a RON of 86.9, representing a 15.1 increase compared to the feedstock RON. The energy consumption of the facility was 27.44 kgOE/t（1kgOE=41.86MJ）. After deducting processing costs, the annual revenue increased by approximately 405.858 million yuan. Analysis of the operational data revealed that due to the presence of adsorption and desorption processes, the temperature of the adsorption tower exhibited periodic changes. As the carbon number increased, the adsorption strength of n-alkanes increased, leading to higher adsorption yields. The surface of 5A molecular sieves has a certain adsorption effect on benzene. To minimize the impact of benzene on subsequent product quality, three solutions have been proposed.

Key words: light gasoline fraction, C₅, C₆, adsorption separation, normal alkane, iso-alkane